Strategies for managing large arrays in JavaScript

Question

Strategies for managing large arrays in JavaScript

I'm currently working on finding the most effective approach for handling large datasets in JavaScript. Specifically, I am dealing with files containing data spanning four hours read at a 100ms interval.

When all the data is loaded into a one-dimensional array, I encounter difficulties loading it all at once. I am considering splitting it into smaller arrays and wondering if there is an optimal size for these arrays.

I would greatly appreciate any advice on this matter as it is my first time encountering such a challenge. Some of the arrays are just 500kb but still do not load properly as single module exports. Does using AJAX offer better performance for some reason? If so, what might be the underlying reasons?

javascript arrays

Answer 1

Answer №1

To retrieve data as a stream, you can utilize the fetch() method along with the .getReader() property found in the Response object. This will provide you with a ReadableStream for reading the data.

fetch("/path/to/server")
.then(response => response.body.getReader())
.then(reader => {
  const processStream = ({done, value}) => {
          if (done) {
            return reader.closed;
          }
          // Handle the `value` which is a chunk of data represented as `Uint8Array`
          return reader.read().then(processStream);
        }
  return reader.read().then(processStream);                
})
.then(() => "Finished reading the stream")
.catch(err => console.error(err));

Answer 2

To retrieve data as a stream, you can utilize the fetch() method along with the .getReader() property found in the Response object. This will provide you with a ReadableStream for reading the data.

fetch("/path/to/server")
.then(response => response.body.getReader())
.then(reader => {
  const processStream = ({done, value}) => {
          if (done) {
            return reader.closed;
          }
          // Handle the `value` which is a chunk of data represented as `Uint8Array`
          return reader.read().then(processStream);
        }
  return reader.read().then(processStream);                
})
.then(() => "Finished reading the stream")
.catch(err => console.error(err));

Strategies for managing large arrays in JavaScript

Answer №1

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